Eilyn, the Rising Storm

When Eilyn, the Rising Storm enters the
battlefield, it deals 6 damage to any target.
Mastery 12: Eilyn, the Rising Storm deals 12
damage to each opponent and each creature,
planeswalker, and site your opponents control.
(When this deals damage and survives, add to its
mastery total. When the mastery target is reached,
gain the effect.)